Can you find the odd number in the following?

2716, 4135, 5321 and 7145

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

You can see it everyday, But cannot touch it at will. What is it?

What has 13 hearts but no other organs?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

I cannot talk, but I always reply when spoken to. What am I?

We know that money can be names differently for the purpose it is used for. Some of the examples of money given at following places or for following activities:

In temple = Daan
In school = Fees
During marriage = Dowry
For divorce = Alimony
Paying government = Tax
In court = Fine
Employer to employee = Salary
To kidnappers = Ransom
For illegal reason = Bribe
To civil servant retirees = Pension

Do you know what do we call the money a husband gives to his wife?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

What is the riddle which can be asked all day with a different correct answer each time.

In the image given, you can find several triangles. Can you count them all?